Nmap troubles

[cwk9]

I've been trying to get nmap up and running on my red hat 7.2 box and it works fine if I use a loop back or my own ip but as soon as I try to scan the computer on my LAN I get this message.

[root@localhost root]# nmap -v -sS -O 192.168.0.1

Starting nmap V. 2.54BETA31 ( www.insecure.org/nmap/ )
Failed to lookup device subnet/netmask: eth0: no IPv4 address assigned
QUITTING!

The windows xp box witch I'm trying to scan is also set up for Internet connection sharing witch leaves my linux box with a address of 192.168.0.2. Every thing seems to be set up correctly so I'm wondering if its 192.168.*.* address that are causing the problem or do I need to some how configure nmap. Attached is a screen shot of my NIC settings just in case that helps.

[cwk9]

hm seem to be having trouble posting the screen shot.

any ways network configuration looks like this

Status Device Nickname Type
---------------------------------------------------
Active eth0:1 eth0 Ethernet


the ip is static and uses these numbers like this

Address: 192.168.0.2
Subnet Mask: 255.255.255.0
Default Gateway Address: 192.168.0.1

And other then nmap everything else is working fine.

[SoggyBottom]

I hate to state the obvious, but why are you trying to scan a machine with a .0 IP Address?

[slarty]

Try using the

-S your ip address
or
-e an interface which has an ipv4 address

Perhaps eth0 does as it suggests not have an ipv4 address, perhaps you only have eth1 bound.

SoggyBottom: It's not a .0 address it just has a .0 in it. Seems like a reasonable enough address to portscan to me.

[cwk9]

My hunch is nmap might not get along with private addresses. Guess I'll have to set up some normal ip's and test this.

http://www.mscs.mu.edu/~doug/spectra...specialip.html <-- more on private ip's and other ip stuff for anyone interested.

[problemchild]

My hunch is nmap might not get along with private addresses

I'm not that up on NMAP like some here are, but I don't think that's it. I use NMAP on my private addresses from time to time with no trouble.

I think Rewandythal is probably the resident NMAP expert if you can catch him in IRC or something.

[er0k]

cwk9 >> make sure you dont have dhcp set up while you try to give them static addresses. that could cause conflicts. it was a problem at my school's sparc boxes, whom were trying to dhcp internals, and already had static addresses. Rewandythal wont be on AO irc or the site i can tell you that much, he hangs at irc.netstat.org under the name of stormhawk... he is indeed an nmap expert. try there if i was wrong.